17. didn't get

18. don't play

19. did - go

20. doesn't watch

21. didn't sell

22. cooks - cooked

23. isn't running

24. were

25. has - went

1. went

2. do - sleep

3. did - do

4. stays

5. do - sit

6. does - earn

7. didn't watch

8. were

9. Are - standing

10. buy

11. is coming

12. read

13. are playing

14. cleaned

15. are - talking

16. waters

\(6,72-x=-12,6+6,3\\ \Rightarrow6,72-x=-6,3\\ \Rightarrow x=6,72-\left(-6,3\right)\\ \Rightarrow x=6,72+6,3\\ \Rightarrow x=13,02\)

Chiều cao của hình thang đó là:

\(\left(4,2+3,4\right):2=3,8\left(cm\right)\)

Diện tích hình thang đó là:

\(3,8\times3,8=14,44\left(cm^2\right)\)